JP2003251700A - Method of sticking decorative film material to body of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of sticking a decorative film material which is excellent in finish properties and a performance. <P>SOLUTION: In an external plate part and/or an internal plate part of the body of an automobile of which the main material is constituted of an aluminum material, an aluminum-coated steel material or a heterogeneous metal material being a combination of the aluminum material with a steel material, the relative roughness of the aluminum material is 0.2 μm or below in Ra, while the aluminum material is a base material of a JIS A6000 series aluminum alloy and is subjected to oxide film coating treatment, and the film decorative film material is stuck to the surface of the aluminum material or the aluminum-coated steel material, according to this method of sticking the decorative film material to the body of the automobile. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer plate portion of an automobile body and / or an aluminum plate, an aluminum-coated steel material, or a dissimilar metal material in which an aluminum material and a steel material are combined.
Or, in the inner plate part, by attaching a film decorative material to the surface of the aluminum material or aluminum-coated steel material, a film makeup for an automobile body excellent in performance such as finish appearance such as image clarity and smoothness, corrosion resistance, and processability The method of pasting materials.

[0002]

2. Description of the Related Art Conventionally, as a method of painting an automobile body, generally, a car body made of steel is subjected to a chemical conversion treatment, and then a primer coating or a top coating is performed. In recent years, in the field of automobiles, the weight of vehicle bodies has become heavier due to the improvement of collision safety performance and the increase of standard equipments, etc., but on the other hand, the substantial improvement in fuel efficiency is required due to the global environmental problems. As one method for satisfying such requirements, it is considered to reduce the weight of the entire automobile by replacing a part or the whole of the automobile body mainly made of steel with an aluminum material. However, there has been a problem that a coating film excellent in the finished appearance and coating film performance cannot be obtained even if the vehicle body part mainly made of aluminum material is coated by a conventional coating method.

Further, when an aluminum material is used for a part of an automobile body (for example, a hood, a roof, a hood, etc.), there is a problem that it vibrates and emits noise while the automobile is running.

Conventionally, the interior and exterior parts of automobiles have been directly coated with a crosslinkable resin coating material such as a melamine curable resin coating material, an isocyanate curable resin coating material and an oxidation curable resin coating material. However, it is difficult to select the most suitable coating method for painting directly on the vehicle body, it is difficult to obtain a uniform coating film thickness, and painting defects (such as cissing, lumps, dust, etc.) due to painting. Easily occurs, the paint required for painting is consumed more than necessary, it is difficult to safely manage the work environment and safety and hygiene of the painting, and it is difficult to collect the painted film. There are problems that it is not preferable from the viewpoint of contamination, that it is not possible to give a wide range of design properties due to spray coating in general, a finished flat plate, and it becomes flat and has a poor three-dimensional effect.

[0005]

Means for Solving the Problems As a result of earnest research, the present inventors have found that a method of attaching a film to an aluminum material can achieve the above object, and have completed the present invention.

That is, the present invention is as follows: 1. In an outer plate portion and / or an inner plate portion of an automobile body, the main material of which is an aluminum material, an aluminum coated steel material, or a dissimilar metal material in which an aluminum material and a steel material are combined, A method of sticking a film decorative material to an automobile body, characterized by sticking a film decorative material to the surface of the aluminum material or aluminum-coated steel material. 2. In the above aluminum material, the surface roughness of the aluminum material is Ra.
Is 0.2 μm or less, the method of attaching a film decorative material to the above-mentioned automobile body, 3. In the above aluminum material, the aluminum material is JIS A6.
A method for attaching a film decorative material to the above-mentioned automobile body, which is a 000 series aluminum alloy base material. 4. The above aluminum material is characterized in that the aluminum material is subjected to an oxidation treatment film treatment. 5. A method for sticking a film decorative material to the above car body, 5. A method for sticking a film decorative material to the above car body, wherein the aluminum material is naturally colored or electrolytically colored 6. A method for attaching a film decorative material to the automobile body, wherein the decorative material is transparent in the film decorative material, 7. A light ray transmitted through the decorative material is colored in the film decorative material. A method for attaching a film decorative material to the above-mentioned automobile body, which is characterized in that the color clear is colored to the extent that the hue of the aluminum material can be identified. To.

Further, as the intermediate coating material or the top coating material of the present invention, a color clear which is transparent or colored to the extent that the base can be identified can be used.

When the color clear is used, for example, when a colored aluminum material which is naturally colored or electrolytically colored is used as the aluminum material and then the color clear is applied, the color clear coating surface is incident. The light rays transmitted through the color clear coating film, the transmitted light rays are reflected by the surface of the colored aluminum material, and the light rays transmitted through the color clear coating film are identified (recognized) by humans as reflected light. The color of the colored aluminum material and the transmitted light of the color clear coating film are overlapped with each other so that a unique color can be developed.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The method of the present invention is a method of attaching a film decorative material to an automobile body, where a part or all of the aluminum material is used, and the surface roughness of the aluminum material is Ra.
The feature is that it is 2 μm or less.

The aluminum material used in the present invention can be used without particular limitation as long as it has been conventionally considered for automobile bodies. Specifically, JIS A500 containing magnesium as an aluminum alloy base material.
Examples thereof include a 0 series aluminum alloy plate and a JIS A6000 series aluminum alloy base material containing magnesium and silica.

In the present invention, in particular, among these aluminum alloy base materials, the JIS A6000 series aluminum alloy base material has a strength due to the above-mentioned contained metal when the paint is baked a plurality of times at a temperature of 140 ° C. or higher. It is preferable to use the latter one because it imparts hardness. The content of the above metal is preferably in the range of 0.5 to 3%.

Further, in the above-mentioned aluminum material, the surface roughness of the aluminum material (which can be measured using a JIS B06013 three-dimensional roughness meter) is 0.2 μm or less in Ra, particularly 0.1.
It is preferable to use one having a thickness of less than μm. Ra is 0.
If it exceeds 2 μm, the smoothness of the electrodeposition coating film applied to the aluminum material is lowered, and as a result, the smoothness of the overcoat coating film (such as a feeling of dustiness) is lowered, resulting in poor gloss of the coating film. There is. On the other hand, if Ra is too small, the adhesion between the cationic electrodeposition coating film and the aluminum material decreases, so it is not preferable to set it to less than 0.01 μm. The surface roughness of such an aluminum material can be adjusted by changing the roughness of the roll at the time of rolling, or by a surface treatment technique such as mechanical polishing, chemical polishing, and electrolytic polishing. As the above-mentioned polishing, electropolishing is particularly preferable because it can facilitate polishing with fine roughness.

Examples of the aluminum-coated steel materials other than the above-mentioned aluminum materials include, for example, electro-aluminized steel plate and molten aluminum steel plate.

As the surface treatment of the aluminum material or the aluminum-coated steel material, conventionally known surface treatment can be performed.

The surface treatment of the aluminum material can be performed according to a conventionally known method, for example, in the order of (1) to (3) described below when the anodizing treatment is not performed.

(1) Pretreatment step: Aluminum material-Mechanical polishing-Degreasing (acid, acid salt, alkali, alkali salt, organic solvent, surfactant, electrolytic degreasing, etc.)-Washing (including neutralization) -Chemical polishing -Washing (2) Chemical film treatment: Phosphate treatment agent (zinc phosphate, iron phosphate, manganese phosphate, etc. to which Albond method belongs), phosphate alcohol treatment agent, chromic acid phosphate treatment agent, Sodium carbonate treatment agent, chromate treatment agent (chromic acid, dichromate, etc.), boehmite method (12
Steam treatment at 0 to 150 ° C, distilled water treatment at 100 ° C, 10
Treatment with distilled water containing amine at 0 ° C.), titanium-based surface treatment agents, fluorine-based surface treatment agents and the like. Further, as a surface treatment agent, an etching agent (inorganic acid, organic acid or salt thereof), heavy metal (Zr, Mo, W, Ti, Mn, Z)
n, Ni, etc.) or a salt thereof (nitric acid, phosphoric acid, hydrofluoric acid, etc.) and, if necessary, a binder (phenol resin, carboxylated polyolefin resin, etc.), a rust inhibitor (vanadic acid, organic phosphonic acid, gallic acid) Acid compounds,
Sulfides, triazine thiols, benzotriazoles, thiocarbonyl compounds, etc.), adhesion promoters (silane coupling agents, silica gel, EROSIL, etc.), which are weakly basic or weakly acid-based organic and / or inorganic substances Surface treatment agents can also be used.

Among the above treatments, the treatment with a zinc phosphate treating agent is preferable. The treatment is a treatment agent which uses a compound such as phosphoric acid, acidic zinc phosphate, potassium fluoride or the like as a raw material, and when the treatment agent and an aluminum material come into contact with each other, aluminum is etched, and then the eluted aluminum is It reacts with phosphoric acid and hydrofluoric acid to form aluminum salts, and acidic zinc phosphate (zinc dihydrogen phosphate) reacts with aluminum and hydrofluoric acid to form zinc triphosphate and deposits on the aluminum surface to form a film. To do.

(3) Post-treatment: Washing-drying When anodizing treatment is carried out, for example, it can be carried out by the following method.

Degreasing-alkali etching-desmut-anodizing treatment-sealing treatment Degreasing-alkali etching-desmut-anodizing treatment-secondary electrolytic coloring Degreasing-polishing (electrolytic polishing, chemical polishing, matte finishing, etc.)-Anodic oxidation Treatment- (Dyeing if necessary) Washing with water was omitted in each step.

The above-mentioned anodizing treatment is, for example,
The sulfuric acid method, oxalic acid method, chromic acid method, boric acid method and the like can be mentioned. Among these, the sulfuric acid method is preferable because it can form a film that is hard and has excellent corrosion resistance. Further, in the process of the above step, the finished appearance of the coating film is excellent, so that the process is preferable.

Examples of the steel material that can be used in combination with the aluminum material include those conventionally used as steel sheets for automobiles. Specific examples thereof include steel sheets, hot-dip galvanized steel sheets, electrogalvanized steel sheets, and other steel sheets, and treated steel sheets that have been subjected to surface treatment such as zinc phosphate treatment and iron phosphate treatment. Also, when using a steel plate, corrosion resistance,
It is preferable to perform cationic electrodeposition coating because a coating film excellent in workability and finished appearance is formed.

In the method of the present invention, when a single metal material such as an aluminum material or an aluminum-coated steel material is used as a material for an automobile body, for example, (1) a member intended for the metal material (engine hood, fender) (Panel etc.), press it, and assemble it by mounting it on the car body, then surface treatment if necessary, electrodeposition coating if necessary, water-based chipping primer coating if necessary, intermediate coating if necessary, then A method of attaching a film decorative material, (2) pressing the target material (engine hood, fender panel, etc.) with the metal material, surface treatment if necessary, electrodeposition coating if necessary, if necessary After applying the chipping primer coating and the intermediate coating as needed, attach it to the car body and assemble it, and then apply the film decorative material Kill.

In the above-mentioned assembly, the type of each paint and the coating method (preliminary drying and baking) are conventionally known methods (for example, 4 coats 1 bake (3 coats of electrodeposition coating, chipping primer coating and intermediate coating). Wet or pre-dry to form a multilayer coating film and finally bake at once,
The same meanings will be given below.) 4 coat 2 bake, 4 coat 3 bake, 4 coat 4 bake, 3 coat 1 bake (3 coats of electrodeposition coating, chipping primer coating, intermediate coating), 3 coat 2 bake, 3 coat Coat 3 bake, 2 coat 1 bake (2 coats of electrodeposition coating, chipping primer coating, electrodeposition coating, 2 coats of intermediate coating, chipping coating, 2 coats of intermediate coating), 1 coat 1 bake (electrodeposition coating) Or 1 coating such as chipping primer coating or intermediate coating).

When a dissimilar metal material in which an aluminum material and a steel material are combined is used as a material for an automobile body, for example, a steel material is pressed into a target member (engine hood, fender panel, etc.), and then, After surface treatment, then the surface-treated steel member is attached to an automobile body to assemble, and then an automobile body obtained by performing electrodeposition coating, water-based chipping primer coating, intermediate coating, and top coating, If desired, press the metal target material (a part other than the above-mentioned parts, such as the bonnet) and apply surface treatment, electrodeposition coating, chipping primer coating, intermediate coating, etc. It can be done by applying a film decorative material after painting and making a pasted part, and attaching this to the automobile body obtained above. The pasting method is not limited to the above method.

As the film decorative material that can be used in the present invention, those conventionally known can be used. Specifically, for example,
A bonding agent layer (a), a holding base material layer (b), a colored coating (c),
A sticking film formed by combining the clear (d) can be used.

As the bonding agent layer (a), the holding base material layer (b) is attached to an adherend (aluminum material or an electrodeposition coating film, a chipping primer coating film, an intermediate coating film, etc. provided as necessary). It is a bonding agent for.

Examples of such a bonding agent include a curing agent-containing bisphenol type epoxy resin, resole type epoxy resin, acrylic resin, aminoplast resin, polyester resin, urethane resin, polysiloxane resin, and the like.
(Is) butylene resin, vinyl acetate resin, vinyl chloride resin, vinyl chloride / vinyl acetate copolymer, synthetic rubber, natural rubber, etc., one or more resins selected from thermosetting type and room temperature curing type. Examples include conventionally known ones such as active energy ray-curable or thermoplastic adhesives and pressure-sensitive adhesives. The bonding agent may be transparent or colored.

As these bonding agents, depending on the type,
It can be used as a pressure-sensitive adhesive, a heat-sensitive adhesive, and a curing type adhesive.

The thickness of the bonding agent layer (a) is usually 1 to 10
It is 0 μm, preferably 5 to 80 μm.

The holding base material layer (b) is a base material for facilitating the attaching work, and specific examples thereof include polyethylene, polypropylene, polyisobutylene, polybutadiene, polystyrene, polychloroprene, polyvinyl chloride. , Polyvinyl acetate, nylon, acrylic resin,
Examples thereof include thermoplastic resins such as polycarbonate, cellulose, polyethylene terephthalate, polyacetal, AS resin and ABS resin, and aluminum foil. The holding base material layer may be transparent or colored.

The thickness of the holding base material layer (b) is usually 10 to 10.
It is 200 μm, preferably 20 to 150 μm.

The colored coating film (c) is formed of, for example, a coating material (base coating material conventionally used in the field of automobile coating materials) or an ink which is a conventionally known curable resin mixed with a coloring pigment. Coating film.

Examples of the curable resin include amino curable resins, polyisocyanate curable resins (which may be blocked), acid epoxy curable resins, hydrolyzable silane curable resins, hydroxyl group epoxy group curable resins. Resin, hydrazine curable resin, oxidative polymerization type curable resin, light (heat)
Radical-polymerizable resins, light (heat) cationic-polymerizable resins, and curable resins obtained by combining two or more of these are mentioned.

Further, as the color pigment, conventionally known color pigments can be used. For example, as the color pigment, titanium oxide, zinc white, lead white, basic lead sulfate, lead sulfate, lithopone, and sulfide can be used. White pigments such as zinc and antimony white; black pigments such as carbon black, acetylene black, lamp black, bone black, graphite, iron black, aniline black; naphthol yellow S, Hansa yellow, pigment yellow L, benzine yellow, permanent yellow, etc. Yellow pigments; orange pigments such as chrome orange, chrome vermilion, permanent orange; brown pigments such as iron oxide and amber; red pigments such as red iron oxide, red lead, permanent red, quinacridone red pigments; cobalt violet, fast violet, methyl Purple such as violet rake Fee, ultramarine, Prussian blue, cobalt blue, phthalocyanine blue, blue pigments such as indigo; chromium green, pigment green B, green pigments such as phthalocyanine green, mica, colored mica, and the like flaky aluminum powder.

The form of the coating material using the curable resin is powder coating material, solventless coating material (including solventless coating material in which a crosslinkable or non-crosslinkable resin is dissolved or dispersed in a radical polymerizable monomer), It may be in any form such as an aqueous paint in which a curable resin is dissolved or dispersed in water, an organic solvent-based paint in which a curable resin is dissolved or dispersed in an organic solvent (including a non-aqueous dispersion type paint), and the like.

The mixing ratio of the curable resin and the color pigment may be appropriately determined depending on the purpose of use and the design property, but normally 100 parts by weight (solid content) of the curable resin is 0 for the color pigment. 0.01 to 200 parts by weight, preferably 0.1 to 100 parts by weight.

The thickness of the colored coating layer is usually 1 to 100 μm.
m, particularly preferably 2 to 80 μm. The colored coating layer may be a single layer or a multicolor multilayer film in which two or more types of colored layers are overlapped. Further, the coating film can be provided with patterns such as characters, pictures, patterns and markings as required. It is also possible to color the base so that it can be seen.

The colored coating layer is formed by coating the curable coating material forming the coating film by a coating method suitable for the type of coating material, for example,
The coating film can be formed by methods such as roller coating, brush coating, electrostatic coating, powder coating, electrodeposition coating, air spray, airless spray, screen printing and gravure printing.

The colored coating layer can be cured by setting an appropriate method (for example, active energy ray irradiation, heating, etc.) and curing conditions depending on the type of the resin composition. For example, a thermosetting resin can be cured by heating at a temperature of about 100 to about 170 ° C. for about 10 to about 40 minutes.

The thickness of the colored coating film (c) is usually 1 to 10
It is 0 μm, preferably 2 to 80 μm.

A clear paint can be applied to the surface of the colored coating layer (c). It is also possible to color the base so that it can be seen. As the clear paint, for example, a paint formed by mixing a conventionally known curable resin with a color pigment (a clear paint conventionally used in the field of automotive paints) or a paint formed of an ink or the like can be used.

The curable resin is the same as described above, for example, amino curable resin, polyisocyanate curable resin (which may be blocked), acid epoxy curable resin, hydrolyzable silane curable resin. Resin, hydroxyl group epoxy group curable resin, hydrazine curable resin, oxidative polymerization type curable resin, light (heat) radical polymerization type resin, light (heat) cation polymerization type resin, and curable resin by combination of two or more thereof. Is mentioned. The clear coating can be cured by the same coating method and curing conditions as described above.

The thickness of the clear (d) is usually 1-100.
μm, preferably 2 to 80 μm.

Further, as the holding base material layer (b), a colored holding base material in which a coloring pigment is mixed in the holding base material layer (b) itself is used, so that the colored coating film (b) can be omitted.

The film decorative material can be attached by pressing the surface of the bonding agent layer (a) against the surface to be adhered and applying pressure from above the clear (d). Further, the application can be done directly by hand, but it can also be done by hand using a squeegee, and further it can be applied using an automatic application machine.

In the film decorative material of the present invention, a conventionally known transfer film can also be used. Examples of this include an application film layer (a polyethylene terephthalate sheet or the like having a film thickness of 20 to 1 formed by laminating a pressure sensitive adhesive to a plastic film).
00 μm, preferably 30 to 80 μm, peeled after transfer), the same clear (d) as described above, a colored coating (b), the same pressure-sensitive adhesive layer (a) and release layer as described above. It is possible to use a transfer flume which is laminated by combining (transferred after peeling).

The application film layer.

The transfer film is attached by peeling off the release layer from the transfer film, pressing the emerging pressure-sensitive adhesive layer (a) surface against the adherend surface and applying pressure from above the application film. You can After application, the application film is peeled off from the clear surface.

In the above film decorative material, when a colored aluminum material that is naturally colored or electrolytically colored is used as the aluminum material, the colored aluminum material can be seen through the film decorative material when the film decorative material is transparent. It is possible to form a coating having excellent design properties, which cannot be obtained by coating an automobile paint. Also, by using a color clear colored film decorative material to the extent that the base can be seen through, the light rays incident from the surface of the color clear coating film are transmitted through the color clear coating film, and the transmitted light rays are Light rays reflected by the surface of the colored aluminum material and transmitted through the color clear coating film are identified (recognized) by humans as reflected light, which makes the color of the colored aluminum material and the transmitted light of the color clear coating film unique. The color of can be expressed.

[0050]

EFFECTS OF THE INVENTION The film decorative material of the present invention has the above-mentioned constitution, and therefore exhibits the following effects.

It is possible to obtain a highly-designed product having a pearly luster excellent in finishability.

In the film decorative material of the present invention provided with the holding base material layer, when an external matter such as pebbles or sand hits the surface of the film, energy due to impact from the surface is absorbed by the holding base material layer. Therefore, even though the surface hardness is high, the performance of the film having excellent durability can be maintained for a long period of time without causing defects such as cracking and peeling of the coating film.

Since the film surface is formed of a cured resin film, it exhibits high hardness and excellent chemical resistance, stain resistance, and abrasion resistance.

Since the decorative material of the present invention has the above-mentioned film structure, it can be easily adhered by applying a sticking method suitable for each film, and defects such as wrinkles are caused by the mounting of the film. Since it does not exist, the finished appearance is excellent.

Further, a conventional melamine curable resin coating material,
Since it is not necessary to directly apply a crosslinkable resin paint such as an isocyanate-curable resin paint or an acid-curable resin paint to a substrate, a suitable method may be selected in advance depending on the coating purpose, coating film performance, designing purpose, etc. You can choose. It is possible to prevent coating defects from occurring due to painting, to prevent the paint required for painting from being consumed more than necessary, and to safely manage the work environment and safety and hygiene of painting. Further, it is easy to collect the applied coating film, which is preferable from the viewpoint of environmental pollution.

The aluminum material has a surface roughness Ra of 0.2 μm.
By using a resin having a thickness of m or less, the finished appearance is improved.

By using a natural coloring or electrolytically colored aluminum material as the aluminum material, an automobile body having a metallic feel and excellent design, which cannot be obtained by conventional automobile paints, can be obtained.

[0058]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples. "Parts" and "%" in Examples and Comparative Examples are based on weight. Further, the present invention is not limited to the embodiments.

Example 1 An aluminum material having a curved surface with a plate thickness of 0.8 mm (JIS A
No. 6061, Ra 0.2 μm) was subjected to a degreasing treatment, an etching treatment and a smut removal treatment by a conventional method, and then 170
Anodizing treatment was performed in a g / liter sulfuric acid aqueous solution to form an anodized film (A) having a thickness of 10 μm. Then, the following film decorative material (1) was attached via the bonding agent surface.
As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, reduced gloss, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and lowering of gloss was examined. there were.

Also, chipping resistance (at −20 ° C., 100 g of crushed stone No. 7 was sprayed onto the coated surface at a pressure of 3 kg / cm ² from an angle of 90 ° with respect to the coated surface, and then the stone surface was applied. A peeling test with a gum tape was performed and evaluated according to the following criteria: ◯: No peeling of the coating film was observed,
Δ: Slight peeling of the coating film is recognized, ×: Significant peeling of the coating film is recognized. The same meanings are given below. As a result, the result of) was good.

Example 2 The aluminum material of the anodized film obtained in Example 1 was subjected to AC secondary electrolysis (15 V, 15 V, in an aqueous solution of 25 g / liter of nickel sulfate).
20 degreeC, 2 minutes-10 minutes) was performed, and the bronze colored aluminum material (B) was obtained. Then, subsequently, the following film decorative material (1) was attached via the surface of the bonding agent. As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, reduced gloss, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and lowering of gloss was examined. there were.

As a result of chipping resistance, the result was good and was good.

Example 3 An aluminum material (JIS A having a curved surface portion with a plate thickness of 0.8 mm)
6061, Ra 0.2 μm) by conventional methods for degreasing and boehmite treatment (steam treatment at 120 to 150 ° C.)
Then, an oxide film (C) was formed. Then, the following film decorative material (1) was attached via the bonding agent surface. As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, reduced gloss, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and lowering of gloss was examined. there were.

As a result of chipping resistance, the result was good and was good.

Example 4 An aluminum material having a curved surface with a plate thickness of 0.8 mm (JIS A
6061, Ra 0.2 μm) by a conventional method, and a phosphate surface treatment agent (manganese biphosphate / manganese silicofluoride / potassium fluoride / acidic zinc phosphate / phosphoric acid aqueous solution) at 50 ° C. It was immersed for 2 to 5 minutes to form a zinc phosphate treatment film (D). Then, the following film decorative material (1) was attached via the bonding agent surface.

As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, gloss reduction, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and deterioration of gloss was examined. there were.

As a result of chipping resistance, the result was good and was good.

Example 5 An aluminum material having a curved surface with a plate thickness of 0.8 mm (JIS A
6061, Ra 0.2 μm) was degreased by a conventional method, and a titanium-treated film (E) was formed using the following titanium-based surface treatment agent. Then, the following film cosmetics (1)
Was affixed via the bonding agent surface.

Titanium-based surface treatment agent: 2% titanium-based aqueous solution (5 cc of 60% titanium tetrachloride solution in distilled water to 500 cc)
Aqueous ammonia (1: 9) was added dropwise to the solution described above to precipitate titanium hydroxide. After washing with distilled water, hydrogen peroxide solution 3
10 cc of 0% solution was added and stirred, and a yellow translucent viscous solid 2% titanium-based aqueous solution containing titanium) 50
Parts, 20% zirconium hydrofluoric acid 5 parts and deionized water 3
A mixture of 5 parts.

As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, gloss reduction, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and lowering of gloss was examined. there were.

As a result of chipping resistance, the result was good and was good.

Example 6 An oxide film (C) subjected to boehmite treatment (steam treatment at 120 to 150 ° C.) was used as an aluminum material. A cationic electrodeposition coating Elektron GT-10 (manufactured by Kansai Paint Co., Ltd., block polyisocyanate curing type epoxy resin electrodeposition coating, gray) is electrodeposited on the aluminum material and baked at 170 ° C. for 20 minutes to give a dry film thickness of about 20 μm. The electrodeposition coated board of was obtained. Then, the following film decorative material (1) was attached via the bonding agent surface. As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, reduced gloss, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and deterioration of gloss was examined. there were.

As a result of chipping resistance, the result was good and was good.

Example 7 An oxide film (C) subjected to boehmite treatment (steam treatment at 120 to 150 ° C.) was used as an aluminum material. A cationic electrodeposition coating Elektron GT-10 (manufactured by Kansai Paint Co., Ltd., block polyisocyanate curing type epoxy resin electrodeposition coating, gray) is electrodeposited on the aluminum material and baked at 170 ° C. for 20 minutes to give a dry film thickness of about 20 μm. The electrodeposition coated board of was obtained. The electrodeposited surface was spray-coated with the following underwater chipping primer so that the dry film thickness was about 6 μm.
It was baked in a dryer at 0 ° C. for 20 minutes. Then, the following film decorative material (1) was attached via the bonding agent surface.

As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, gloss reduction, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and lowering of gloss was examined. there were.

As a result of chipping resistance, the result was good and was good.

Example 8 An oxide film (C) subjected to boehmite treatment (steam treatment at 120 to 150 ° C.) was used as an aluminum material. A cationic electrodeposition coating Elektron GT-10 (manufactured by Kansai Paint Co., Ltd., block polyisocyanate curing type epoxy resin electrodeposition coating, gray) is electrodeposited on the aluminum material and baked at 170 ° C. for 20 minutes to give a dry film thickness of about 20 μm. The electrodeposition coated board of was obtained. The electrodeposited surface was spray-coated with the following underwater chipping primer so that the dry film thickness was about 6 μm.
Baking was performed at 20 ° C. for 20 minutes in a drier, and then the following thermosetting aqueous intermediate coating composition was applied by spraying so as to have a film thickness of 30 μm, and baking was performed at 140 ° C. for 20 minutes. Then, the following film decorative material (1) was attached via the bonding agent surface. As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, reduced gloss, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and deterioration of gloss was examined. there were.

As a result of chipping resistance, the result was good and was good.

Example 9 The following film decorative material (2) was attached to the surface of the bronze colored aluminum material (B) through the bonding agent surface. As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, reduced gloss, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

The formed film decorative material thus obtained has an excellent design and has a high-saturation appearance. Such an appearance is obtained by directly spray-painting a vehicle body of a conventional automobile to form a coating film. It had a high design quality that could not be expressed by the method of obtaining it.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and deterioration of gloss was examined. there were.

As a result of chipping resistance, the result was good and good.

Example 10 Anionic electrodeposition paint (Electron AG (Kansai Paint Co., Ltd., melamine-curable acrylic resin electrodeposition paint, clear)) was electrodeposited onto the above-mentioned bronze colored aluminum material (B), and 17
It was baked at 0 ° C. for 20 minutes to obtain an electrodeposition coated plate having a dry film thickness of about 20 μm. Next, film cosmetics (2)
Was affixed via the bonding agent surface. As a result, the appearance of the film decorative material (wrinkles, blisters, bubbles,
There were no defects such as reduced gloss, peeling and cracks) were good.

The obtained film decorative material has an excellent design and a highly saturated appearance. Such an appearance is obtained by directly spray-painting a vehicle body of a conventional automobile to form a coating film. It had a high design quality that could not be expressed by the method of obtaining it.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and lowering of gloss was examined. there were.

As a result of chipping resistance, the result was good and was good.

Example 11 The above bronze colored aluminum material (B) was electrodeposited with an anion electrodeposition paint and baked at 170 ° C. for 20 minutes to obtain an electrodeposition coated plate having a dry film thickness of about 20 μm. Then, the film decorative material (3) was transferred to and pasted onto this product via the bonding agent surface. As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, reduced gloss, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

Further, the formed film decorative material thus obtained is excellent in design and has a high-saturation appearance. Such an appearance is obtained by directly spray-coating a car body of a conventional automobile to form a coating film. It had a high design quality that could not be expressed by the method of obtaining it.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and deterioration of gloss was examined. there were.

As a result of chipping resistance, the result was good and good.

Example 12 The above-mentioned cationic electrodeposition coating composition was applied to a surface-treated plate obtained by surface-treating an automobile outer plate (zinc-iron alloy hot-dip galvanized steel plate) excluding the bonnet portion with a zinc phosphate treating agent so as to have a thickness of 20 μm. After washing with water and baking at 170 ° C. for 20 minutes, the following thermosetting water-based intermediate coating composition is applied to the electrodeposition coated steel sheet having a film thickness of 30.
It is sprayed so that it becomes μm, and it is 20 at 140 ℃.
Baked for minutes. Next, the following pearlescent composition is spray-coated to a dry film thickness of 20 μm, and the temperature is set to 100 ° C.
After baking for 10 minutes, the following clear composition is spray coated to a dry film thickness of 20 μm, and the temperature is 140 ° C.
Baked for 20 minutes. Separately from the vehicle body described above, the following film decorative material (1) is attached to the aluminum material corresponding to the bonnet part (the zinc phosphate treatment film (D)) via the bonding agent surface, and the film decorative material attachment is attached. I made a member. Next, a vehicle body was created by combining the two. As a result, the appearance of the film decorative material (there were no defects such as wrinkles, blisters, bubbles, loss of gloss, peeling, and cracks on both the curved surface portion and the flat surface portion) was good.

After immersing the decorative material in water at 40 ° C. for 20 days, the presence of defects such as peeling of the film-attached portion, blistering, and deterioration of gloss was examined. there were.

As a result of chipping resistance, the result was good and good.

Comparative Example 1 A zinc-iron alloyed hot dip galvanized steel sheet was surface-treated with a zinc phosphate treatment agent, and the following thermosetting aqueous intermediate coating composition was spray-coated to a film thickness of 30 μm on the surface treated sheet. 1
Baking at 40 ° C. for 20 minutes. Then, the following pearlescent composition was spray-coated so that the dry film thickness was 20 μm, baked at 100 ° C. for 10 minutes, and then the following clear composition was spray-coated so that the dry film thickness was 20 μm. It was baked at 20 ° C. for 20 minutes. As a result, the surface of the coating film was inferior in terms of lower gloss, cracked skin, pinholes, etc. as compared with those of the examples.

The chipping resistance was Δ.

Aqueous chipping primer: propylene /
Ethylene copolymer (weight ratio: 70/30, number average molecular weight: about 20
0000) 10 parts by weight of 100 parts by weight of maleic acid is graft-polymerized to neutralize the resin, aqueous dispersion (static glass transition temperature: −41 ° C., tensile breaking strength elongation at −20 ° C .: 400
%).

Intermediate coating: (“Rugabek intermediate coating gray”, manufactured by Kansai Paint Co., Ltd., trade name, polyester resin / melamine resin type, organic solvent type), dry film thickness 40 μm
Base film decorative material (1) (colored): polyethylene terephthalate (50 μm), which was electrostatically spray-coated to a thickness of m and baked at 140 ° C. for 30 minutes, was coated with the following pearlescent composition to give a dry film thickness of 20 μm. Screen print so that
After baking at 00 ° C. for 10 minutes, the following clear composition was screen-printed to a dry film thickness of 20 μm,
Bake at 100 ° C for 10 minutes, then apply acrylic pressure-sensitive adhesive (30μ) on the back side of polyethylene terephthalate.
m) laminated.

Pearlescent composition: Hydroxyl group-containing acrylic resin (hydroxyl value 100, number average molecular weight 20000) 70
Parts, 30 parts of hexamethylene diisocyanate cross-linking agent, and titanium oxide-coated phosphorus schist mica (maximum diameter 10-20 μ,
Thickness 0.5-1μ, optical thickness of titanium oxide about 140n
m, geometrical thickness of about 60 nm, trade name "Iriodin 103
R ”, manufactured by Merck & Co., Inc.) 10 parts by weight of an organic solvent type ink.

Clear composition: Hydroxyl group-containing acrylic resin (hydroxyl value 100, number average molecular weight 20000) 70
Part, 30 parts of hexamethylene diisocyanate cross-linking agent, an organic solvent type ink.

Film decorative material (2) (clear): The above clear composition was screen-printed on the surface of polyethylene terephthalate (50 μm) so that the dry film thickness was 20 μm, baked at 100 ° C. for 10 minutes, and then polyethylene terephthalate. An acrylic pressure-sensitive adhesive (30 μm) is laminated on the back surface of the.

Film decorative material (3) (pattern printing): A pearlescent composition is applied to one side of a releasable polyethylene terephthalate film layer (application film) with a knife coater in a marble pattern to give a dry film thickness of 30 μm. Screen printing was performed and baking was performed at 80 ° C. for 15 minutes to obtain a laminated film.

Separately, an acrylic pressure-sensitive adhesive (16 μm) was applied to the surface of the release treated film to obtain an adhesive film. The pearlescent surface of the above-mentioned laminated film and the acrylic pressure-sensitive adhesive surface obtained above are face-contacted with each other and pressed to bond with each other to obtain an application film / retan PG-80 (clear) / acrylic pressure-sensitive adhesive / A transfer film obtained by laminating a release treatment film was obtained.

Claims (7)

[Claims] 1. An outer plate portion and / or an inner plate portion of an automobile body whose main material is an aluminum material, an aluminum-coated steel material, or a dissimilar metal material in which an aluminum material and a steel material are combined,
A method of attaching a film decorative material to an automobile body, which comprises applying a film decorative material to the surface of the aluminum material or aluminum-coated steel material. 2. The method for attaching a film decorative material to an automobile body according to claim 1, wherein the aluminum material has a surface roughness Ra of 0.2 μm or less. 3. The aluminum material according to claim 1, wherein the aluminum material is JI.
A method for attaching a film decorative material to an automobile body according to claim 1 or 2, which is a SA6000 series aluminum alloy base material. 4. The aluminum material according to claim 1, wherein the aluminum material is subjected to an oxidation treatment film treatment.
4. A method for attaching a film decorative material to the automobile body according to any one of items 1 to 3. 5. The film decorative material is attached to an automobile body according to any one of claims 1 to 4, wherein the aluminum material is naturally colored or electrolytically colored. Method. 6. The method for attaching a film decorative material to an automobile body according to claim 1, wherein the film decorative material is transparent. 7. The film decorative material according to claim 1, which is a color clear colored to such an extent that a light ray transmitted through the decorative material can distinguish the hue of the colored aluminum material. A method of attaching film cosmetics to the car body.